• Android
• Arduino
• Assembly
• C
• C++
• Java
• Lua
• Free Pascal
• PHP
• Python

• x86 PC
• Raspberry Pi
• Arduino

• Processes
• Pipes
• Sockets
• Files
• ncurses

• Tkinter in Python
• Gtk4
• Gtk in Python
• PyQt5 in Python
• Kivy in Python
• Qt in C++
• Java Swing
• JavaFX

• Setup TLS certificates
• PHP
• Sinatra micro-framework (Ruby)
• Flask micro-framework (Python)
• Django framework (Python)

• IRC
• Email
• Serial
• XMPP

• Processing
• p5.js
• OpenFrameworks
• Blender
• raylib
• Phaser.js - Game development library for browser

• Java
• Kivy
• NativeScript
• ReactNative
• Qt
• JavaFX
• raylib

See: FreeDOS programming